CN207453916U - The quick unfreezing apparatus for work of novel multi-use - Google Patents
The quick unfreezing apparatus for work of novel multi-use Download PDFInfo
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- CN207453916U CN207453916U CN201720655702.2U CN201720655702U CN207453916U CN 207453916 U CN207453916 U CN 207453916U CN 201720655702 U CN201720655702 U CN 201720655702U CN 207453916 U CN207453916 U CN 207453916U
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- lifting
- clamping
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- seat
- lower base
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Abstract
The utility model discloses a kind of quick unfreezing apparatus for work of novel multi-use easy to use, are mainly made of jarring lifting device, the setting device of well head centering, spinner assembly and hydraulic system；The jarring lifting device includes：Rack, upper pedestal, lower base, two lifting devices, four side cylinders, take-up housing and sealing slips, two lifting devices are arranged between upper pedestal and lower base, and the lifting device includes：The lifting upper cylinder being fixed in rack and the lower oil cylinder of lifting, under the lifting upper cylinder and lifting oil inlet and oil outlet are respectively arranged on oil cylinder, the piston rod of the lower oil cylinder of two liftings is connected with lower base, and the piston rod of two lifting upper cylinders is connected with upper pedestal.
Description
Technical field
The utility model is related to a kind of petroleum well workover Work machine more particularly to a kind of quick unfreezing operation dresses of novel multi-use
It puts.
Background technology
Mid-late oilfield development often occurs falling because of underground due to drilling tools such as engineering factor and geologic(al) factor, down-hole strings
Object, set change, the downhole tools corrosion such as packer hydraulic anchor, sand card, salt card, the accident of wax deposition corrosion and card resistance are, it is necessary to right
Tubing string carries out unfreezing and carries out the operations such as well-flushing, salvaging, back-off, tubing string promotion, shut-in well again.Conventional method is to use heavy repair task vehicle
Drawing unfreezing, piston jarring releasing, the unfreezing of milling cutting method, breakouting pack of dynamite, instrument back-off.These types of method often operation journey
Sequence is complicated, and equipment replacement is frequent, and cost is very higher, is also easy to that tubing string is caused to damage, and difficulty of construction is big, and operation is not easy to control, solution
It still needs to carry out back-off spinner capping operation, heavy workload, inefficiency using other power tools after card.Plain tubing solution clamps
Mostly taper single cylinder design is put, slips easily flies out after release, triggers security incident, common twin-tub release device and wellhead flange
During connection, due to device lower face with wellhead flange upper end surface in blind area, it is difficult to centering, and it is bolted not easy to operate, card
Usually because tubing string deflection when watt clamping, slips both sides straight end face folder flat tube column, in addition common release device is mostly drawing by force
Unfreezing easily causes second accident, generally requires to be buckled to after unfreezing, salvage, capping operation is set, it is necessary to replace several work
Standby, work efficiency is low, and production cost is high.
Utility model content
Technical problem to be solved in the utility model is：There is provided a kind of novel multi-use easy to use quick unfreezing operation
Device.
In order to solve the above-mentioned technical problem, the technical solution adopted in the utility model is：The quick unfreezing operation of novel multi-use
Device is mainly made of jarring lifting device, the setting device of well head centering, spinner assembly and hydraulic system；The jarring is promoted
Device includes：Rack, upper pedestal, lower base, two lifting devices, four side cylinders, take-up housing and sealing slips, two liftings
Device is arranged between upper pedestal and lower base, and the lifting device includes：Be fixed at lifting upper cylinder in rack and
The lower oil cylinder of lifting, is respectively arranged with oil inlet and oil outlet, under two liftings under the lifting upper cylinder and lifting on oil cylinder
The piston rod of oil cylinder is connected with lower base, and the piston rod of two lifting upper cylinders is connected with upper pedestal, in the upper pedestal
Be provided on lower base with drilling tool tubing string cooperate pedestal inner cavity, in the pedestal inner cavity two of the upper pedestal and lower base
Side is respectively arranged with take-up housing, and one end of take-up housing is connected by bolt with connecting plate, is provided on connecting plate and bolt
The bolt hole of mutual cooperation, connecting plate are fixed on the piston rod of side cylinder, and side cylinder drives take-up housing to move left and right, take-up housing
Sealing slips is arranged with inside the other end, if the inside on sealing slips is evenly arranged with dry glue core mounting groove, packing unit
It is arranged in the glue core mounting groove to cooperate with it, is provided with mounting hole in the middle part of sealing slips, is set in the middle part of take-up housing
The through hole to cooperate with mounting hole is equipped with, fixing bolt is fixed on slips is sealed on take-up housing through mounting hole and through hole,
Material returned bolt hole is respectively arranged in the both sides of the sealing slips, is respectively arranged on the both sides of the sealing slips in
Shifting block and the installation base slot to cooperate with it；Spinner assembly is provided with above the lower base, in the lower base
Lower section is provided with the setting device of well head centering；The structure of the setting device of well head centering includes：It centering seat, clamping hoop and holds out against
Bolt；The upper end of seat is provided with hollow connecting pole and clamping hoop retainer plate in described pair, at the middle part of the hollow connecting pole
The inner cavity to cooperate with drilling tool tubing string is provided with, the centering seat is connected by hollow connecting pole with lower base, described
The lower end of centering seat is internally provided with the installation cavity to cooperate with wellhead flange, and the lower end outside of seat is uniformly set in described pair
Several grooves and guide pad to cooperate with well head silk plug are equipped with, guiding surface is provided on the inside of the guide pad；
The upper end of the clamping hoop is provided with clamping block, is provided with what is cooperated with clamping hoop retainer plate in clamping block on described
Fixing groove is provided with lower clamping block in the lower end of the clamping hoop, is provided in the middle part of the lower clamping block and puller bolt
The bolt hole of mutual cooperation；The middle part of the puller bolt is set through the bolt hole on lower clamping block on the puller bolt
It is equipped with and fixes the empty conical nose to cooperate with wellhead flange；The structure of the spinner assembly includes：It is arranged on upper pedestal
The mounting base at end in the inside both sides of the mounting base is slided and is provided with slip clamping seats respectively, and two are slided clamping seats difference
It is connected with the piston rod of clamping cylinder, is slided at two on clamping seats and be respectively arranged with hydraulic motor, in the hydraulic motor
Output shaft on be connected with main drive gear, it is described slip clamping seats in set there are two with main drive gear cooperate
Driven gear, the driven gear are set on the rotary shaft, and spinner gear, the rotation axis are additionally provided in the rotation axis
It is rotatably arranged on and is slided on clamping seats by bearing.
In order to preferably solve above-mentioned technical problem, the further technical solution that the utility model uses is：In the machine
Operating platform is provided on frame, guardrail is provided on the operating platform.
The utility model has the advantages that：The above-mentioned quick unfreezing apparatus for work of novel multi-use, it is existing with wellhead flange automatic centering
Field is quickly and expediently installed, deflection tubing string auto-strengthening, and jarring promotes unfreezing and drawing by force is avoided to damage tubing string, while has spinner
Function, several work can be carried out synchronously, and not need to change equipment.
Description of the drawings
Fig. 1 is the structure diagram of the quick unfreezing apparatus for work of the utility model novel multi-use.
Fig. 2 is the structure diagram of the quick unfreezing apparatus for work heeling condition of the utility model novel multi-use.
Fig. 3 is the structure diagram of take-up housing in the quick unfreezing apparatus for work of the utility model novel multi-use.
Fig. 4 is the structure diagram of two sealing slips in the quick unfreezing apparatus for work of the utility model novel multi-use.
Fig. 5 is the schematic cross-sectional view of lower base in the quick unfreezing apparatus for work of the utility model novel multi-use.
Fig. 6 is the structure diagram of centering seat in the quick unfreezing apparatus for work of the utility model novel multi-use.
Fig. 7 is the present invention looks up structural representation of centering seat in the quick unfreezing apparatus for work of the utility model novel multi-use.
Fig. 8 is that the connection structure of clamping hoop and puller bolt is shown in the quick unfreezing apparatus for work of the utility model novel multi-use
It is intended to.
In figure：1st, rack, 2, upper pedestal, 3, lower base, 4, lifting device, 41, lifting upper cylinder, 42, the lower oil cylinder of lifting,
43rd, oil inlet, 44, oil outlet, 5, side cylinder, 51, piston rod, 6, take-up housing, 61, bolt, 62, connecting plate, 63, bolt hole,
64th, through hole, 7, sealing slips, 71, glue core mounting groove, 72, mounting hole, 73, fixing bolt, 74, material returned bolt hole, 75, centering
Shifting block, 76, installation base slot, 8, pedestal inner cavity, 9, packing unit, 10, centering seat, 101, hollow connecting pole, 102, clamping hoop
Retainer plate, 103, inner cavity, 104, installation cavity, 105, groove, 106, guide pad, 107, guiding surface, 11, clamping hoop, 111, on
Clamping block, 112, fixing groove, 113, lower clamping block, 12, puller bolt, 121, conical nose, 13, mounting base, 131, slip clamp
Tight seat, 132, clamping cylinder, 133, piston rod, 134, hydraulic motor, 135, driven gear, 136, rotation axis, 137, spinner tooth
Wheel, 138, bearing, 14, operating platform, 15, guardrail.
Specific embodiment
The particular content of the utility model is described in detail in the following with reference to the drawings and specific embodiments.
As shown in Figure 1, Figure 2, shown in Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7, Fig. 8, the quick unfreezing apparatus for work of novel multi-use, mainly by
Jarring lifting device, the setting device of well head centering, spinner assembly and hydraulic system composition；The jarring lifting device includes：Machine
Frame 1, upper pedestal 2, the lifting device 4, four of lower base 3, two side cylinder 5, take-up housing 6 and sealing slips 7, two lifting devices
4 are arranged between upper pedestal 2 and lower base 3, and the lifting device 4 includes：The lifting upper cylinder 41 being fixed in rack 1
With the lower oil cylinder 42 of lifting, oil inlet 43 and oil outlet are respectively arranged on oil cylinder 42 under the lifting upper cylinder 41 and lifting
44, the piston rod of the lower oil cylinder 42 of two liftings is connected with lower base 3, the piston rod and upper pedestal 2 of two lifting upper cylinders 41
It is connected, the pedestal inner cavity 8 to cooperate with drilling tool tubing string is provided on the upper pedestal 2 and lower base 3, at the seat of honour
8 both sides of pedestal inner cavity of body 2 and lower base 3 are respectively arranged with take-up housing 6, and one end of take-up housing 6 passes through bolt 61 and connecting plate
62 are connected, and the bolt hole 63 to cooperate with bolt 61 is provided on connecting plate 62, and connecting plate 62 is fixed on side cylinder 5
On piston rod 51, side cylinder 5 drives take-up housing 6 to move left and right, and sealing slips 7 is arranged with inside 6 other end of take-up housing, is being sealed
If the inside on slips 7 is evenly arranged with dry glue core mounting groove 71, packing unit 9 is arranged on the glue core installation to cooperate with it
In slot 71,7 middle part of sealing slips is provided with mounting hole 72, is provided at the middle part of take-up housing 6 and cooperates with mounting hole 72
Through hole 64, fixing bolt 73 is fixed on slips 7 is sealed on take-up housing 6 through mounting hole 72 and through hole 64, in the sealing
The both sides of slips 7 are respectively arranged with material returned bolt hole 74, are respectively arranged on the both sides of the sealing slips 7 to middle shifting block 75
With the installation base slot 76 to cooperate with it；Spinner assembly is provided with above the lower base 3, in the lower base 3
Lower section is provided with the setting device of well head centering；The structure of the setting device of well head centering includes：Centering seat 10,11 and of clamping hoop
Puller bolt 12；The upper end of seat 10 is provided with hollow connecting pole 101 and clamping hoop retainer plate 102 in described pair, in the sky
The middle part of heart connecting pole 101 is provided with the inner cavity 103 to cooperate with drilling tool tubing string, and the centering seat 10 passes through hollow connecting pole
101 are connected with lower base 3, and the lower end of seat 10 is internally provided with the installation cavity to cooperate with wellhead flange in described pair
104, the lower end outside of seat 10 is evenly arranged with several grooves 105 and guide pad to cooperate with well head silk plug in described pair
106, the inside of the guide pad 106 is provided with guiding surface 107；The upper end of the clamping hoop 11 is provided with clamping block
111, the fixing groove 112 to cooperate with clamping hoop retainer plate 102 is provided in clamping block 111 on described, in the clamping
The lower end of hoop 11 is provided with lower clamping block 113, is provided at the middle part of the lower clamping block 113 and cooperates with puller bolt 12
Bolt hole；The middle part of the puller bolt 12 is set through the bolt hole on lower clamping block 113 on the puller bolt 12
Have and fix the empty conical nose 121 to cooperate with wellhead flange；The structure of the spinner assembly includes：It is arranged on upper pedestal 2
The mounting base 13 of upper end is slided to be provided in the inside both sides of the mounting base 13 and slides clamping seats 131, two slip clamps respectively
Tight seat 131 is connected respectively with the piston rod of clamping cylinder 132 133, is slided at two on clamping seats 131 and is respectively arranged with hydraulic pressure
Motor 134 is connected with main drive gear on the output shaft of the hydraulic motor 134, is set in the slip clamping seats 131
There are two the driven gears 135 to cooperate with main drive gear, and the driven gear 135 is arranged in rotation axis 136, in institute
It states and spinner gear 137 is additionally provided in rotation axis 136, the rotation axis 136 is rotatably arranged on slip clamping seats by bearing 138
On 131.
As shown in Figure 1 and Figure 2, in order to make operating personnel's operation more convenient, operating platform is provided in the rack 1
14, it is provided with guardrail 15 on the operating platform 14.
The above-mentioned quick unfreezing apparatus for work of novel multi-use in 5 impetus of side cylinder sealing slips 7 in use, can control shifting
It is dynamic, it realizes that the full envelope of drilling tool tubing string and casing annulus is sealed with half, carries out press seal well operations, release device need not be dismantled and replace peace
Dress shut-in well blowout hookup is respectively arranged on the both sides of sealing slips 7 to middle shifting block 75 and convex with installation that it cooperates
Platform slot 76 seals 7 both sides of slips at two and is respectively designed with the middle shifting block 75 of mutual cooperation and installation base slot 76 up and down, when
When tubing string has inclination, shifting block 75 is automatic when two sealing slips 7 clamp pushes the tiltedly tubing string in well toward endoporus center, prevents close
7 both sides straight end face of envelope slips directly presss from both sides flat tube column, causes disconnected de-, realization auto-strengthening function.
The above-mentioned quick unfreezing apparatus for work of novel multi-use is in use, the sealing slips 7 in upper pedestal 2 clamps drilling tool tubing string
Afterwards, the piston rod of lifting device 4 is risen, after Overstroke, the sealing slips 7 in lower base 3 clamps, interior in upper pedestal 2
Sealing slips 7 unclamp, the piston rod 51 of elevating ram 5 declines, perseveration, during drilling tool tubing string unfreezing operation, lower base 3 by
It is connected in wellhead flange, sealing slips 7 can be close on the outside of drilling tool tubing string, strength is adjustable, seals slips by HYDRAULIC CONTROL SYSTEM
It, whether can be real in locking tubing string state or the non-locking state of clamping convenient for clamping and shunting in a well with packing unit 9 on 7
Annular space shut-in well function with pressure and tubing string unfreezing operation function on the outside of existing drilling tool tubing string.It, can under the promotion of two lifting devices 4
It realizes that drilling tool tubing string pulls up unfreezing, and can realize the downward drawing unfreezing of drilling tool tubing string, set respectively in the both sides of sealing slips 7
Material returned bolt hole 74 is equipped with, the sealing slips 7 of different size can be convenient for changing, carries out the drilling tool tubing string solution of different size form
Card operation.
The above-mentioned quick unfreezing apparatus for work of novel multi-use, is designed with the setting device of well head centering, is designed with well head centering seat
The installation cavity 104 of seal apparatus bottom is consistent with wellhead flange diameter, the lower end outside to middle seat 10 be evenly arranged with it is several with
The groove 105 and guide pad 106 that well head silk plug cooperates to avoid the well head silk plug on wellhead flange, ensure that entire new
Type is mostly used quick unfreezing apparatus for work can slip into flange upper surface and its automatic centering automatically, then block well with four clamping hoops 11
Mouth flange and centering seat 10 rotate puller bolt 12, make the fixation on the entrance wellhead flange of conical nose 121 of puller bolt 12
In hole, then tighten puller bolt 12.It so solves wellhead flange upper surface to be connected since vision is blind with release device lower face
Area is difficult to the problem of centering and flange bolt connects unworkable difficulty, substantially increases the speed of well head installation connection
And efficiency.
The hydraulic system of the above-mentioned quick unfreezing apparatus for work of novel multi-use by diesel engine, storage battery, oil cylinder, pump, control valve and
High pressure line forms, and starts diesel engine and drives hydraulic oil pump rotation, and hydraulic oil enters through high pressure line, control valve in working cylinder,
Make the clamping or release of pedestal sealing slips 7, pressure fuel pump and drawing tonnage are designed on hydraulic system operation platform display panel
The table of comparisons, hydraulic system can adjust with limiting system maximum stream flow and maximum pressure, prevent drawing by force from cutting tubing string to reach
Cause second accident.When after the limit of design reaches still cannot smooth unfreezing when, need to just start jarring lifting device, jarring is promoted
Device is designed with two groups of lifting devices 4, and lifting device 4 is duplex oil cylinder, and the lifting device 4 includes：It is fixed at rack 1
On lifting upper cylinder 41 and the lower oil cylinder 42 of lifting, tubing string oil cylinder 42 while promoted in the case where being subject to lift upper cylinder 41 and lifting
When, it may occur that the flexible deformation of certain length, when needing jarring, we are using in the lower oil cylinder 42 of hydraulic valve rapid blow-down lifting
Hydraulic oil, tubing string under elastic force effect will snapback, it is several so as to form the once downward jarring of strength to Ka Jing positions
It is a back and forth after, card resistance can loosen under jarring, then carry out drawing can smooth unfreezing, and effectively can avoid pulling out by force and cause tubing string
It is disconnected de-.
After card resistance releases, it is often necessary to carry out spinner operation, at this moment need to just start spinner assembly, avoid reinstalling spinner
The Power Tong of operation improves operating efficiency, and when spinner assembly works, two clamping cylinders 132 drive simultaneously slides clamping seats 131
Step up tubing string to centre is mobile, 137 rotation of the driving spinner of hydraulic motor 134 gear is embraced tubing string and rotated forward or backwards, realizes
Spinner operation.
Claims (2)
1. the quick unfreezing apparatus for work of novel multi-use, it is characterised in that：Mainly by jarring lifting device, the setting dress of well head centering
It puts, spinner assembly and hydraulic system composition；The jarring lifting device includes：Rack (1), upper pedestal (2), lower base (3), two
A lifting device (4), four side cylinders (5), take-up housing (6) and sealing slips (7), two lifting devices (4) are arranged on the seat of honour
Between body (2) and lower base (3), the lifting device (4) includes：The lifting upper cylinder (41) being fixed in rack (1)
With the lower oil cylinder (42) of lifting, be respectively arranged on oil cylinder (42) in the lifting upper cylinder (41) and under lifting oil inlet (43) and
Oil outlet (44), the piston rod of the lower oil cylinder (42) of two liftings are connected with lower base (3), the work of two lifting upper cylinders (41)
Stopper rod is connected with upper pedestal (2), is provided with what is cooperated with drilling tool tubing string on the upper pedestal (2) and lower base (3)
Pedestal inner cavity (8) is respectively arranged with take-up housing (6) in pedestal inner cavity (8) both sides of the upper pedestal (2) and lower base (3), sliding
One end of block (6) is connected by bolt (61) with connecting plate (62), is provided on connecting plate (62) and bolt (61) phase
The bolt hole (63) mutually coordinated, connecting plate (62) are fixed on the piston rod (51) of side cylinder (5), side cylinder (5) band movable slider
Seat (6) moves left and right, and sealing slips (7) is arranged with inside take-up housing (6) other end, and the inside on sealing slips (7) is uniform
If being provided with dry glue core mounting groove (71), packing unit (9) is arranged in the glue core mounting groove (71) to cooperate with it, close
Mounting hole (72) is provided in the middle part of envelope slips (7), is provided in the middle part of take-up housing (6) and leads to what mounting hole (72) cooperated
Hole (64), fixing bolt (73) will seal slips (7) through mounting hole (72) and through hole (64) and be fixed on take-up housing (6),
The both sides of the sealing slips (7) are respectively arranged with material returned bolt hole (74), are set respectively on the both sides of the sealing slips (7)
The installation base slot (76) for being equipped with centering shifting block (75) and cooperating with it；Spinner is provided with above the lower base (3)
Device is provided with the setting device of well head centering below the lower base (3)；The structure bag of the setting device of well head centering
It includes：Centering seat (10), clamping hoop (11) and puller bolt (12)；The upper end of seat (10) is provided with hollow connecting pole in described pair
(101) and clamping hoop retainer plate (102), it is provided in the middle part of the hollow connecting pole (101) and drilling tool tubing string cooperates
Inner cavity (103), the centering seat (10) is connected by hollow connecting pole (101) with lower base (3), the seat in described pair
(10) lower end is internally provided with the installation cavity (104) to cooperate with wellhead flange, in described pair outside the lower end of seat (10)
Side is evenly arranged with several grooves (105) to cooperate with well head silk plug and guide pad (106), in the guide pad (106)
Inside be provided with guiding surface (107)；The upper end of the clamping hoop (11) is provided with upper clamping block (111), on described
The fixing groove (112) to cooperate with clamping hoop retainer plate (102) is provided in clamping block (111), in the clamping hoop (11)
Lower end be provided with lower clamping block (113), be provided in the middle part of the lower clamping block (113) and puller bolt (12) phase interworking
The bolt hole of conjunction；The middle part of the puller bolt (12) is through the bolt hole on lower clamping block (113), in the puller bolt
(12) it is provided on and fixes the empty conical nose (121) to cooperate with wellhead flange；The structure of the spinner assembly includes：If
The mounting base (13) in upper pedestal (2) upper end is put, is slided respectively in the inside both sides of the mounting base (13) and is provided with slip clamp
Tight seat (131), two are slided clamping seats (131) and are connected respectively with the piston rod of clamping cylinder (132) (133), in two cunnings
Hydraulic motor (134) is respectively arranged on dynamic clamping seats (131), master is connected on the output shaft of the hydraulic motor (134)
Drive gear, there are two the driven gears to cooperate with main drive gear for setting in the slip clamping seats (131)
(135), the driven gear (135) is arranged in rotation axis (136), and spinner tooth is additionally provided in the rotation axis (136)
It takes turns (137), the rotation axis (136) is rotatably arranged on by bearing (138) and slided on clamping seats (131).
2. the quick unfreezing apparatus for work of novel multi-use described in accordance with the claim 1, it is characterised in that：In the rack (1)
Operating platform (14) is provided with, guardrail (15) is provided on the operating platform (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720655702.2U CN207453916U (en) | 2017-06-07 | 2017-06-07 | The quick unfreezing apparatus for work of novel multi-use |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720655702.2U CN207453916U (en) | 2017-06-07 | 2017-06-07 | The quick unfreezing apparatus for work of novel multi-use |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207453916U true CN207453916U (en) | 2018-06-05 |
Family
ID=62247281
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720655702.2U Expired - Fee Related CN207453916U (en) | 2017-06-07 | 2017-06-07 | The quick unfreezing apparatus for work of novel multi-use |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207453916U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110552638A (en) * | 2019-10-25 | 2019-12-10 | 郭子江 | Automatic control unmanned operation device for oil field |
-
2017
- 2017-06-07 CN CN201720655702.2U patent/CN207453916U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110552638A (en) * | 2019-10-25 | 2019-12-10 | 郭子江 | Automatic control unmanned operation device for oil field |
| CN110552638B (en) * | 2019-10-25 | 2024-02-02 | 郭子江 | Unmanned operation device for automatic control of oil field |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180605 Termination date: 20210607 |
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| CF01 | Termination of patent right due to non-payment of annual fee |